Views: 0 Author: QT Publish Time: 2025-08-28 Origin: QT
In refining and petrochemical operations, catalyst efficiency directly impacts profitability. Common challenges include excessive coke formation, low isomerization selectivity, and short catalyst lifetime. These pain points not only reduce throughput but also increase the frequency of costly regeneration cycles.
Recent research and refinery trials have highlighted ZSM-22 (TON framework zeolite) as a robust solution. Its one-dimensional 10-ring channel system and high thermal stability make it particularly suitable for hydroisomerization of long-chain paraffins, selective cracking, and dewaxing applications.
In hydroisomerization, achieving the right balance between conversion and selectivity is crucial. Many conventional zeolites over-crack paraffins, leading to excess light gases instead of valuable isomers.
How ZSM-22 addresses this:
Narrow 1D pores (0.52 × 0.45 nm) restrict access of bulky intermediates, suppressing over-cracking.
Enhances selectivity toward branched isomers, improving octane number and diesel cold flow properties.
Reference: Weitkamp, J. (2000). Catalytic Hydroisomerization of Alkanes. Catalysis Today, 62, 115–122.
Catalyst deactivation by coke is a constant headache. Refiners often shorten run lengths due to rapid pore blockage.
How ZSM-22 addresses this:
1D pore system minimizes the formation of polyaromatic coke precursors.
Lower coke deposition compared with 3D zeolites like ZSM-5, extending catalyst lifetime and reducing regeneration downtime.
Reference: Guisnet, M. & Magnoux, P. (2001). Coking and Deactivation of Zeolites: Influence of Pore Structure. Applied Catalysis A: General, 212, 83–96.
Some catalysts lose crystallinity or collapse under prolonged hydrothermal conditions.
How ZSM-22 addresses this:
Exhibits excellent hydrothermal stability.
When combined with metals like Pt or Pd, ZSM-22-based catalysts show enhanced durability in hydroisomerization and dewaxing units.
Reference: Chen, N. Y., Degnan, T. F., & Smith, C. M. (1994). Molecular Transport and Reaction in Zeolites. Wiley-VCH.
Shape-selectivity for controlled isomerization
Reduced coke formation, extending cycle length
High thermal stability under refinery conditions
Flexible applications: hydroisomerization, selective cracking, dewaxing
We are preparing to launch ZSM-22 (TON framework catalyst) soon, with complete technical documentation:
Si/Al ratio ranges
BET surface area data
Particle size distributions
XRD and SEM analysis
Independent QC test reports
Clients can register interest to receive the technical datasheet upon release.
Q1: How is ZSM-22 different from ZSM-5 in refinery applications?
A:ZSM-5 has a 3D pore network, which promotes cracking but also leads to faster coke formation. ZSM-22 has a 1D pore system, resulting in better selectivity and lower coke deposition.
Q2: What role does ZSM-22 play in improving diesel cold flow properties?
A:By selectively isomerizing long-chain paraffins into branched isomers, ZSM-22 significantly improves diesel’s low-temperature operability.
Q3: Can ZSM-22 be combined with metals for enhanced performance?
A:Yes. ZSM-22 is often loaded with Pt, Pd, or Ni, enabling bifunctional catalysis that improves both hydrogenation capacity and isomerization efficiency.
Q4: Is ZSM-22 suitable for FCC (Fluid Catalytic Cracking)?
A:While ZSM-22 is less common in FCC than ZSM-5, it can be used as an additive for olefin selectivity improvement and reduced dry gas yield.
Q5: How does ZSM-22 perform under high pressure hydroisomerization?
A:ZSM-22 maintains structural integrity and selectivity under high hydrogen pressure, making it effective in both lubricant base oil upgrading and diesel isomerization.
Q6: When will your ZSM-22 product be available?
A:We expect to release ZSM-22 soon with full datasheets. Customers may subscribe for early updates and request pilot samples once production is finalized.
